How to keep same texture coordinates on model exported from Blender to glTF?
The glTF format needs an actual UV map, not Blender-generated coordinates.  Blender offers many ways to bake or project different kinds of coordinates into a UV map, many of which are available with the u shortcut when in &quot;Edit Mode.&quot;
Blender's glTF exporter also supports UV transformations to a limited extent.  You should avoid complex things like nonuniform-scale rotations of UV coordinates, but a simple transform will work.
Ultimately you'll need to get your coordinates into a UV Map and assign that to the material, before exporting to glTF.